what all do i need to change as far as gaskets and what not when changing out my y-pipe.

 

You'll need the two crush gaskets that mate the y to the manifolds, and a gasket to mate the y to the cat.
You may also find the nut/bolts rusted on the cat, making it very difficult to get off. You may want to take it to a shop before you start to get them loosened and change the bolts.

David

 

haha why did u get a new ypipe? i hope the guy u bought it from was a cool guy..